Safety singletree



Aug.3o,193s. C. w. MCVEY y z-,lzsss- SAFETY SINGLETREE Filed April 7, '1957 INVENTOR ATTORNEYS Patented Aug. 30, 1938 UNITED STATES PATENT OFFICE SAFETY SINGLETREE- Charles W. McVey, St. Ignatius, Mont.

Application April 7, 1937, Serial No. 135,550

1 Claim.

which will prevent the traces from becoming ac' cidentally disconnected from the singletree when slack occurs in the traces.

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and' claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a longitudinal sectional View illus-y trating a singletree equipped with my invention.

Figure 2 is an enlarged fragmentary longitudinal sectional View showing one of the fasteners.

Figure 3 is a View similar to Figure 2 showing one of the fasteners in an open position.

Figure 4 is a sectional View taken on the line 4--4 of Figure 2.

Figure 5 is a fragmentary top plan view illustrating one end of the singletree and a portion of the fastener adapted thereto.

Referring in detail to the drawing, the numeral I indicates a singletree preferably constructed of channel iron material and has its ends shaped to form spaced ears 2 apertured to receive pivot pins 3. 'Ihe pins 3 support hooks 4, the free ends of which may move into and out of openings 5 formedin the singletree. Coil springs 6 lie within the singletree and are connected to each other and to said hooks for the purpose of normally urging the hooks into position so that their free 5 ends enter the openings 5. 'I'he free ends of the hooks 4 when disposed in the openings 5 of the singletree will prevent traces or the like from becoming accidentally disconnected from the hooks.

To disconect the traces it is only necessary t0 10 swing the hooks into positions as shown in Figure 3 against the action of the springs 6 and as soon as said hooks are manually released the springs return them into positions with the free ends entering the openings 5.

What is claimed is:

A device of the character set forth comprising a singletree of channel iron construction including parallel opposed Walls and a connecting wall having openings adjacent the ends of said single- 20 tree, hooks pivoted on the opposed walls of the singletree and adjacent the ends of the latter and capable of occupying positions either with the ends thereof extending into said openings or out of said openings to permit the application and 25 removal of traces thereto, and connected coil springs lying within the walls of the singletree and connectedto said hooks between the pivots thereof and the free ends of the hooks for urging the hooks into positions with the free ends enter- 30 ing the openings.

CHARLES W. MCVEY. 

